package d0309;

public class Human {
    public void foo(Human human){
        if (human instanceof Men ){
            System.out.println("纯爷们");
        }
        else{
            System.out.println("俏姑娘");
        }
    }
    public static void main(String args[]){
        Human human = new Men();
        human.foo(human);

    }
}
class Men extends Human{

}
class Women extends Human{

}
